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OpenStudy (anonymous):
Please solve log4 (y – 9) + log4 3 = log4 81
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jhonyy9 (jhonyy9):
property of logarithm log a + log b =log (a*b)
jhonyy9 (jhonyy9):
so ((y-9)3=81 3y-27=81 3y=108 y=108/3 y=36
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